Issue 24, 2020

Lewis-base containing spiro type hole transporting materials for high-performance perovskite solar cells with efficiency approaching 20%

Abstract

Owing to excellent performance and dopability, spiro-OMeTAD remains an irreplaceable hole transporting material (HTM) in perovskite solar cells (PSCs). In order to further improve the performance of spiro-OMeTAD based PSCs, a Lewis base can be introduced into the structure of spiro-OMeTAD wisely, which can keep the advantages of spiro-OMeTAD while incorporating the functionality of a Lewis base in passivating the surface of the perovskite. Therefore, spiro-type HTMs (spiro-CN-OMeTAD with a dicyano group and spiro-PS-OMeTAD with a thiocarbonyl group) were synthesized and confirmed by density functional theory (DFT) calculations and X-ray single-crystallographic diffraction. Spiro-CN-OMeTAD as an HTM is certified to have a suitable interfacial band alignment with the perovskite, good film quality and effective defect passivation, which facilitate the resulting device to achieve an efficiency of 19.90% with a high open-circuit voltage, low hysteresis, and improved stability. This study provides an alternative strategy for the molecular design of better HTMs in high-performance PSCs.

Graphical abstract: Lewis-base containing spiro type hole transporting materials for high-performance perovskite solar cells with efficiency approaching 20%

Supplementary files

Article information

Article type
Paper
Submitted
09 Mar 2020
Accepted
20 Mai 2020
First published
21 Mai 2020

Nanoscale, 2020,12, 13157-13164

Lewis-base containing spiro type hole transporting materials for high-performance perovskite solar cells with efficiency approaching 20%

J. Xu, L. Liang, C. Mai, Z. Zhang, Q. Zhou, Q. Xiong, Z. Zhang, L. Deng and P. Gao, Nanoscale, 2020, 12, 13157 DOI: 10.1039/D0NR01961E

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements